DE60213306D1 - Image forming apparatus with control of the amount of light from at least two laser beams - Google Patents

Image forming apparatus with control of the amount of light from at least two laser beams

Info

Publication number
DE60213306D1
DE60213306D1 DE60213306T DE60213306T DE60213306D1 DE 60213306 D1 DE60213306 D1 DE 60213306D1 DE 60213306 T DE60213306 T DE 60213306T DE 60213306 T DE60213306 T DE 60213306T DE 60213306 D1 DE60213306 D1 DE 60213306D1
Authority
DE
Germany
Prior art keywords
light
amount
image forming
forming apparatus
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE60213306T
Other languages
German (de)
Other versions
DE60213306T2 (en
Inventor
Toshihiro Sugiyama
Hiroshi Ishii
Hiroshi Saitoh
Yuji Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of DE60213306D1 publication Critical patent/DE60213306D1/en
Application granted granted Critical
Publication of DE60213306T2 publication Critical patent/DE60213306T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
    • G03G15/5041—Detecting a toner image, e.g. density, toner coverage, using a test patch
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • H04N1/40037—Circuits exciting or modulating particular heads for reproducing continuous tone value scales the reproducing element being a laser
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure
    • G03G15/0435—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure by introducing an optical element in the optical path, e.g. a filter
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00025—Machine control, e.g. regulating different parts of the machine
    • G03G2215/00029—Image density detection
    • G03G2215/00033—Image density detection on recording member
    • G03G2215/00037—Toner image detection
    • G03G2215/00042—Optical detection
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/04—Arrangements for exposing and producing an image
    • G03G2215/0402—Exposure devices
    • G03G2215/0404—Laser

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Laser Beam Printer (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Mechanical Optical Scanning Systems (AREA)
DE60213306T 2001-03-21 2002-03-21 Image forming apparatus with control of the amount of light from at least two laser beams Expired - Lifetime DE60213306T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001080713A JP2002278178A (en) 2001-03-21 2001-03-21 Image forming device
JP2001080713 2001-03-21

Publications (2)

Publication Number Publication Date
DE60213306D1 true DE60213306D1 (en) 2006-09-07
DE60213306T2 DE60213306T2 (en) 2007-08-23

Family

ID=18936948

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60213306T Expired - Lifetime DE60213306T2 (en) 2001-03-21 2002-03-21 Image forming apparatus with control of the amount of light from at least two laser beams

Country Status (4)

Country Link
US (1) US6700595B2 (en)
EP (1) EP1243979B1 (en)
JP (1) JP2002278178A (en)
DE (1) DE60213306T2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6867791B2 (en) * 2003-03-19 2005-03-15 Kabushiki Kaisha Toshiba Image forming apparatus and image forming method
EP1467261B1 (en) * 2003-04-11 2011-11-02 Ricoh Company, Ltd. Image forming apparatus for preventing image deterioration caused by fallen conductive brush and scatter of developer
US7421239B2 (en) * 2003-08-26 2008-09-02 Ricoh Company, Ltd. Cleaning apparatus for removing toner adhered onto endless belt
EP1681171A1 (en) * 2005-01-13 2006-07-19 Custom Engineering SpA Laser writing head for printer
US7358980B2 (en) * 2005-01-24 2008-04-15 Hewlett-Packard Development Company, L.P. Imaging device and methods
US7408567B2 (en) * 2005-03-29 2008-08-05 Kabushiki Kaisha Toshiba Light beam scanning apparatus and image forming apparatus
US7379682B2 (en) * 2005-09-30 2008-05-27 Lexmark International, Inc. Optimization of operating parameters, including imaging power, in an electrophotographic device
US7616908B2 (en) * 2006-06-29 2009-11-10 Kabushiki Kaisha Toshiba Image forming apparatus and method having exposure control depending on first and second density patches
US7583908B2 (en) * 2006-07-25 2009-09-01 Kabushiki Kaisha Toshiba Image forming apparatus using an electrophotographic process and image forming method
JP5247058B2 (en) * 2007-04-09 2013-07-24 キヤノン株式会社 Image forming apparatus
US7995934B2 (en) * 2007-09-20 2011-08-09 Ricoh Company, Limited Developing device, image forming apparatus, and process unit
JP2009175366A (en) * 2008-01-23 2009-08-06 Canon Inc Image forming device, and control method therefor, and program
JP5181956B2 (en) * 2008-03-03 2013-04-10 株式会社リコー Electrophotographic equipment
US20150192820A1 (en) * 2014-01-06 2015-07-09 Litemax Electronics Inc. Lcd screen capable of preventing the phenomenon of blackening lcd panel
JP6123736B2 (en) * 2014-05-30 2017-05-10 コニカミノルタ株式会社 Image forming apparatus and exposure position adjusting method
JP6864852B2 (en) * 2017-10-04 2021-04-28 京セラドキュメントソリューションズ株式会社 Image forming device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02137866A (en) * 1988-11-18 1990-05-28 Ricoh Co Ltd Controller for electrostatic recording copying machine
JP2584136B2 (en) * 1991-03-01 1997-02-19 松下電器産業株式会社 Image forming device
JP3279072B2 (en) * 1994-07-01 2002-04-30 富士ゼロックス株式会社 Light beam interval adjusting method for image forming apparatus
JPH09141934A (en) * 1995-09-18 1997-06-03 Ricoh Co Ltd Image recording device
JP3422158B2 (en) 1996-01-18 2003-06-30 富士ゼロックス株式会社 Image forming device
JPH10181091A (en) * 1996-12-27 1998-07-07 Fuji Xerox Co Ltd Image forming apparatus
JP3762054B2 (en) * 1997-07-16 2006-03-29 株式会社リコー Image recording device
JPH11227253A (en) * 1998-02-19 1999-08-24 Toshiba Corp Image forming apparatus and method for controlling laser output of the same
US6081348A (en) 1998-03-05 2000-06-27 Xerox Corporation Ros beam failure detector

Also Published As

Publication number Publication date
EP1243979A1 (en) 2002-09-25
US6700595B2 (en) 2004-03-02
JP2002278178A (en) 2002-09-27
US20020135656A1 (en) 2002-09-26
EP1243979B1 (en) 2006-07-26
DE60213306T2 (en) 2007-08-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition